Today’s update brings a cumulative set of updates for Windows 10 version 20H2 and above. Here’s what’s new in the released patches.

KB5001330 (OS builds 19041.928 and 19042.928)

If you are running Windows 10, version 20H2, or version 2004, patch KB5001330 makes the following changes to the operating system.

  • Indicates an issue where an administrator in a trusted MIT domain cannot get a Kerberos service ticket from Active Directory domain controllers (DCs). This occurs on devices that have Windows updates installed that contain CVE-2020-17049 security and have PerfromTicketSignature set to 1 or higher. These updates were released between 10. November 2020 and 8. November 2020. December 2020 published. The ticket entry also ends with a KRB_GENERIC_ERROR error if the caller provides a ticket without a PAC (TGT) as the proof ticket without specifying the USER_NO_AUTH_DATA_REQUIRED flag.
  • Fixes security vulnerabilities identified by the security researcher. Due to these vulnerabilities, this update and all future Windows updates will no longer include the RemoteFX vGPU feature. For more information on this vulnerability and how to fix it, see CVE-2020-1036 and KB4570006. Alternative secure vGPUs are available via discrete device allocation (DDA) in Windows Server LTSC (Windows Server 2016 and Windows Server 2019) and Windows Server SAC (Windows Server, version 1803 and later).
  • This is a potential vulnerability for elevating privileges, allowing Azure Active Directory web login random browsing from third-party endpoints used for federated authentication. For more information, see CVE-2021-27092 and CSP Policy – Authentication.
  • Security updates for Windows App, Windows Apps, Windows Input and Composition, Windows Office Media, Windows Fundamentals, Windows Cryptography, Windows AI Platform, Windows Kernel, Windows Virtualization, and Windows Media platforms and frameworks.

KB5001337 (OS Build 18363.1500)

Update KB5001337 is available for Windows 10 version 1909, it shares the above change log.

  • Indicates an issue where an administrator in a trusted MIT domain cannot get a Kerberos service ticket from Active Directory domain controllers (DCs). This happens on devices that have Windows updates installed that contain CVE-2020-17049 protection and have a PerfromTicketSignature value of 1 or higher. These updates were released between 10. November 2020 and 8. November 2020. December 2020 published. The ticket capture also ends with a KRB_GENERIC_ERROR error if the caller provides a ticket without a PAC (TGT) as proof ticket without specifying the USER_NO_AUTH_DATA_REQUIRED flag.
  • Fixes security vulnerabilities identified by the security researcher. Due to these vulnerabilities, this update and all future Windows updates will no longer include the RemoteFX vGPU feature. For more information on this vulnerability and how to fix it, see CVE-2020-1036 and KB4570006. Alternative secure vGPUs are available via discrete device allocation (DDA) in Windows Server LTSC (Windows Server 2016 and Windows Server 2019) and Windows Server SAC (Windows Server, version 1803 and later).
  • This is a potential vulnerability for elevating privileges, allowing Azure Active Directory web login random browsing from third-party endpoints used for federated authentication. For more information, see CVE-2021-27092 and CSP Policy – Authentication.
  • Security updates for Windows App, Windows Apps, Windows Input and Composition, Windows Office Media, Windows Fundamentals, Windows Cryptography, Windows AI Platform, Windows Hybrid Cloud Networking, Windows Kernel, Windows Virtualization, and Windows Media platforms and frameworks.

Other adverse reactions

The following updates are available for older versions of Windows 10 through Enterprise channels.

  • KB5001342, Build 17763.1879 for Windows 10 Version 1809
  • KB5001339, Build 17134.2145 for Windows 10 Version 1803
  • KB5001347, Build 14393.4350 for Windows 10 Version 1607
  • KB5001340, build 10240.18906 for the first version of Windows 10.

Installing updates

To download these updates, open Settings – > Updates & Recovery and click Check for updates on the right.

You can also get it from the Windows Update online catalog.

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Posted by Sergey Tkachenko on 13. April 2021 in Windows 10.

About Sergei Tkachenko

Sergey Tkachenko is a Russian software developer who founded Winaero in 2011. In this blog Sergey writes about everything related to Microsoft, Windows and popular software. Follow him on Telegram, Twitter and YouTube.

frequently asked questions

What is the cumulative update for Windows 10 version 1909?

Interview. Windows 10, version 1909 is a collection of features for targeted performance improvements, business features, and quality enhancements. In order to provide these updates in the best possible way, we are performing this function in a new way: with the help of maintenance technology.

Do I need to install all cumulative updates for Windows 10?

About a billion devices worldwide are running Windows 10. Hundreds of millions of others have used older versions of this ubiquitous software. The short answer is yes, you need to install them all. …

Are Windows 10 updates cumulative?

According to Microsoft’s schedule, Windows 10 feature updates will come twice a year. Quality updates address safety and reliability issues and do not include new features. These updates are cumulative and increase the minor version number after the major version number.

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